25 lines
909 B
Text
25 lines
909 B
Text
rule trojan_win_backwash_iis : XEGroup
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{
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meta:
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author = "threatintel@volexity.com"
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date = "2020-09-04"
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description = "Variant of the BACKWASH malware family with IIS worm functionality."
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reference = "https://www.volexity.com/blog/2021/12/07/xe-group-exposed-8-years-of-hacking-card-skimming-for-profit/"
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hash = "98e39573a3d355d7fdf3439d9418fdbf4e42c2e03051b5313d5c84f3df485627"
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memory_suitable = 1
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license = "See license at https://github.com/volexity/threat-intel/blob/main/LICENSE.txt"
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strings:
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$a1 = "GetShell" ascii
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$a2 = "smallShell" ascii
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$a3 = "createSmallShell" ascii
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$a4 = "getSites" ascii
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$a5 = "getFiles " ascii
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$b1 = "action=saveshell&domain=" ascii wide
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$b2 = "&shell=backsession.aspx" ascii wide
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condition:
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all of ($a*) or
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any of ($b*)
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}
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